Ok, my Home Assistant is up & running and I’ve been through the instructions your, provide to integrate with SharpTools but it says:
“Error fetching addon info: Addon 506c6dd7_sharptools_io with version latest does not exist in the store”
when I click on the repository entry 
What troubleshooting steps have you tried so far?
And can you share more details about your environment and exactly what step you saw the error at?
Per the installation guide, after adding the repository to Home Assistant, you may need to tap the
...in the top-right corner of the add-on screen and tap reload, then wait 30-60 seconds to see if the items from the repository show up.
I started again and now have ‘SharpTools.io’ showing up in the HA sidebar, but clicking on it, it shows HA Websocket with a green circle, but 'SharpTools.io - red circle.
To get to this, point I went:
In ST - Manage Connections > Select Platform > HA, which switches me to my HA account then
Add //github.com/sharptools-io/hass-addons.git > click on Add
After some blue circling I now see SharpTools Add-ons at the bottom entry of the HA Add-on Store.
I clicked on it and it asked whether I want it to start on boot, a Watchdog (whatever that is) and if I want to see it in the HA sidebar.
Returning to ST, HA remains unchecked as a platform & I can’t access any of the HA entities.
All sorted now: the problem was my browser preventing pop-ups. Thanks for your patience! - all is working well 
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